import { useState } from "react";

const useNumValid = () => {
	const [value, setValue] = useState('');
	const onChange = e => {
		setValue(e.target.value);
	}
	const err = /^\d+$/.test(value) || !value ? '' : '请输入数字'

	
	return { value, onChange, err }
}

export default useNumValid;